wonka/lib/js/src/wonka_helpers.js

A fast push & pull stream library for Reason, loosely following the [callbag spec](https://github.com/callbag/callbag)

'use strict';

var Block = require("bs-platform/lib/js/block.js");
var Curry = require("bs-platform/lib/js/curry.js");
var Caml_option = require("bs-platform/lib/js/caml_option.js");

function talkbackPlaceholder(param) {
  return /* () */0;
}

function captureTalkback(source, sinkWithTalkback) {
  var talkback = /* record */[/* contents */talkbackPlaceholder];
  return Curry._1(source, (function (signal) {
                if (typeof signal !== "number") {
                  if (!signal.tag) {
                    talkback[0] = signal[0];
                  }
                  
                }
                return sinkWithTalkback(signal, talkback[0]);
              }));
}

function makeTrampoline(sink, f) {
  var state = /* record */[
    /* exhausted */false,
    /* inLoop */false,
    /* gotSignal */false
  ];
  return sink(/* Start */Block.__(0, [(function (signal) {
                    var match = state[/* exhausted */0];
                    if (signal || match) {
                      return /* () */0;
                    } else {
                      state[/* gotSignal */2] = true;
                      if (state[/* inLoop */1]) {
                        return 0;
                      } else {
                        var explode = function (_param) {
                          while(true) {
                            var match = f();
                            if (match !== undefined) {
                              state[/* gotSignal */2] = false;
                              sink(/* Push */Block.__(1, [Caml_option.valFromOption(match)]));
                              if (state[/* gotSignal */2]) {
                                _param = /* () */0;
                                continue ;
                              } else {
                                return 0;
                              }
                            } else {
                              state[/* exhausted */0] = true;
                              return sink(/* End */0);
                            }
                          };
                        };
                        state[/* inLoop */1] = true;
                        explode(/* () */0);
                        state[/* inLoop */1] = false;
                        return /* () */0;
                      }
                    }
                  })]));
}

exports.talkbackPlaceholder = talkbackPlaceholder;
exports.captureTalkback = captureTalkback;
exports.makeTrampoline = makeTrampoline;
/* No side effect */